C#•15mo ago

❔ Fire and forget

Is there a recommended way to call an async void, or to run an async task as fire and forget? I havent been able to find any that doesent cause a warning, and i would rather not supress it.

5 Replies

cap5lut•15mo ago

simply dont await the task eg

class Program
{
  public static async Task Main()
  {
    FireAndForgetAsync();
    Console.WriteLine("This should print immediately");
    await Task.Delay(2000);
    Console.WriteLine("Bye, bye");
  }
  public static async Task FireAndForgetAsync()
  {
    await Task.Delay(1000);
    Console.WriteLine("FireAndForgetAsync()");
  }
}

class Program
{
  public static async Task Main()
  {
    FireAndForgetAsync();
    Console.WriteLine("This should print immediately");
    await Task.Delay(2000);
    Console.WriteLine("Bye, bye");
  }
  public static async Task FireAndForgetAsync()
  {
    await Task.Delay(1000);
    Console.WriteLine("FireAndForgetAsync()");
  }
}

Cattywampus•15mo ago

that will throw warning @cap5lut you should do it with _ discard also why you made it async/await when you're not planning to await it?

Becquerel•15mo ago

you get a warning because if the async method throws an exception and you don't await it you won't catch the exception properly

Angius•15mo ago

public void SynchronousMethod()
{
    try {
        _ = AsynchronousMethod();
    } catch (Exception e) {
        // log **everything** because no exceptions will be handled for you
    }
}

public void SynchronousMethod()
{
    try {
        _ = AsynchronousMethod();
    } catch (Exception e) {
        // log **everything** because no exceptions will be handled for you
    }
}

is about the only proper way to go about fire&forget

Accord•15mo ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

Gaming

Programming

❔ Fire and forget